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(No Model.)

- E. 86 J. P. SW-ARTZWELDER.

I MACHINE FOR BENDING AND WELDING LINKS. No 304,676. Patented Sept. 2, 1884.

I mllllll 1 Nrrnn STATE EMMETT SYVARTZVELDER AND JOHN P. SWVART-ZWVELDER, OF SHARISBURG, PA., ASSIGNORS TO THEMSELVES,JOHN SCOTT, AND JOHN L. SMITH, ALL OF SAME PLACE, AND CHARLES A. SCOTT, OF PITTSBURG, PA.

MACHINE FOR BENDING AND WELDING LINKS.

:JFBCIFICATIQN forming part of Letters Patent No. 304,676, dated September 2, 1884'.

Application filed February 20. 1884.

To all whom it may concern:

Be it known that we, EMMETT SWARTZWEL- DER and J OHN P. Swnnrzwnnnnn, citizens of the United States, residing at Sharpsburg, 5 county of Allegheny, State of Pennsylvania, have invented or discovered a new and useful Improvement in Machines for Bending and Velding Links; and we do hereby declare the following to be aful], clear, concise, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in whichlike letters indicating like parts Figure 1 is a view in side elevation of a machine embodying our invention and having one of the side plates broken away. Figs. 2,

3, and 4 are detail views showing the position of certain parts at different stages in the operation of the machine. Fig. 5 is an enlarged detail view of the mandrel or former.

The object of our invention is to so construct and arrange the parts of a machine as to bend a blank into link shape and weld together the ends thereof; and to this end our 2 5 invention consists, in general terms, in the construction and combination of parts, all. as more fully hereinafter described and claimed.

On the top of aframe, A, is secured asteamcylinder, 13, within which is reciprocated a piston of the usual construction, and on the piston-rod b is secured a block, 0, provided with wings cl, having rounded corners, as shown. This block 0 reeiprocatesina slot, at, in the frame A, and the wings d project'into recesses formed in said frame on each side of the slot a, the sides of which serve as guides for the block 0 in its movements. The open ing a in the lower part of. the frame is made of a width equal to or a little greater than the 40 length of the blank to be operated on,and

the sides of said opening serve as guides in.

placing the blank on the mandrel. On the base of the frame, directly under the pistonrod [2, is placedthe anvil e, grooved in its face, as shown. In the recesses in the frame are pivoted the levers f, having inwardly-curved ends 9 h of sufficientlength to project into the path of the winged block 0. At thelower end (No model.)

of the slot a, and within the recesses in the frame, are mounted the grooved rollers k, whose outer peripheries are in line with the sides of the slot.

To the lower end of the piston-rod b is attached a mandrel or former, Z, having a shape corresponding to the shape of the link or armade in two parts, Z and n, and one of these parts, Z,is recessed or cut away on one side for nearly its entire length along the line of the bottom \of the groove m, and into the recess thus formed is detachably secured the part a, in one edge of which is formed part of groove m. The lower end, 0, of the mandrel is left solid, as shown, as that part performs the function of the hammer in the welding operation. To secure the part a in place, a bolt, 1), provided with a head, (1, is passed through a hole in the part a, and to the end of this belt is secured a button, 8, and in the mandrel Z is formed a narrow slot, through which the button 8 passes when putting the part a in place. Then by turning theheadqof the bolt the button will turn across the slot tand hold the part a in place. The lower end of the part a is made V-shaped, and fits into acorrespondingly-shaped recess in the part 0 of the mandrel, thereby preventing any lateral movement of the part n during the operation of the machine.

' The operation of the machine is as follows: The mandrel is lowered until its upper end is below the rollers k, as shown in Fig. 1. A heated, blank, 10, having its ends oppositely beveled, is placed in the groove on of the mandrel, the sides of the frame serving as guides to center the blank on the mandrel. Steam is then admitted to the cylinderB to raise the mandrel. As the mandrel rises the blank is caught on each side of the mandrel and bent into U shape around its upper end moves up the rollers force the blank against its sides, as shown in Fig. 2. As the mandrel As the mandrel ,may be taken to complete the welding.

continues its upward movement the rounded upper ends of the wings d of the block 0 strike against the ends ,1 of the levers f and force said ends outward and the ends h inward. During the inward movement of these ends h they strike and bend the ends of the blank w around the lower end of the mandrel, causing the beveled ends of the blank tooverlap, as shown in Fig. 3. The piston and mandrel are then caused to descend, and the overlapped ends of the blank strike in the groove or recess of the anvil e, and are welded together, as shown in Fig. 4. The part it is then removed, thereby allowing of the ready removal of the completed link. If one downward stroke of the mandrel is not sufficient to thoroughly weld the ends of the blank, several short strokes It will be noticed that the lower rounded ends of the wings d strike the ends it of the levers f and force them apart, and consequently force the ends 9 inward to a position to be acted on by the wings at the next upward movement of the block. 5

Although we have shown the rollers k stationary, they may be made adjustable horizontally to suit blanks of varying thickness.

\Vhile we have shown and described this machine as constructed to form links, we do not wish to confine ourselves thereto, as, by simply changing the form of the mandrel, rings, sockets, and other like articles may be bent and welded.

In place of the rollers 70, we may form a solid abutment at the corners of the lower end of the slot a. In such case these solid abutments will bend the blank around the upper end of the mandrel in its upward stroke.

\Ve claim herein as our invention- 1. In a machine for bending and welding links, a reciprocating mandrel, in combination with bending-rollers 7c, vibrating levers f, and the anvil 0, said parts being mounted on a suitable frame, substantially as set forth.

2. In a machine for bending links, a reciprocating piston carrying a mandrel and provided witha guide-block having rounding corners, in combination with the vibrating levers f, having inwardly-bent ends, said parts being mounted in a suitable frame in such relation to each other that the upward movement of the guide-block will close the lower or operative ends of the levers f, and the downward. movement of the block will close the upper ends of said levers, thereby bring ing said upper ends in position to be operated on by the block in its upward movement, sub 7 stantially as set forth.

3. In a machine for bending and welding links, the combination of the frame A, slotted and recessed as described, the reciprocating piston b, carrying a mandrel, and provided with the winged guide-block c, the bent vibrating levers f, pivoted in the recesses of the frame, and the anvil e, substantially as set forth.

4. In a mandrel for a link bending and welding machine, the part Z, recessed as described, and having the solid head 0, in combination with the removable part n and a suitable device for locking said parts together, substantially as set forth.

In testimony whereof we have hereunto set our hands.

EMMETT SWARTZWELDER. JOHN P. SWARTZXVELDER. \Vitnesses:

DARWIN S. VVOLCOIT, R. H. WVHrrTLnsnY. 

